Extrusion processing of complex shaped ceramic tubes and honeycombs

Extrusion processing which involves the shaping of a visco-plastic formable paste through a specially designed die is the most commonly used technique used for the manufacture of honeycombs and tubes. The honeycomb extrusion is a complex process involving lateral flow of the dough followed by the knitting with adjacent cross section within the die the rheological properties of the dough play a major role. Because of the flexibility in tailoring, honeycombs can be engineered to exhibit a unique combination of mechanical and thermal properties for diversified thermo structural applications Rheological properties depends on a variety of factors such as the choice of the binder, the extent of solids loading in the dough, the particle characteristics of the ceramic powder used, etc.